The Learning of Exclusive-or Categories by Monkeys (Macaca mulatta) and Humans (Homo sapiens)
A central question in categorization research concerns the categories that animals and humans learn naturally and well. Here, the authors examined monkeys’ (Macaca mulatta) and humans’ (Homo sapiens) learning of the important class of exclusive-or (XOR) categories. Both species exhibited–through a sustained level of ongoing errors–substantial difficulty learning XOR category tasks at 3 stimulus dimensionalities. […]
Categorization of natural stimuli by monkeys (macaca mulatto)- effects of stimulus set size and modification of exemplars
The concept humans was studied in two experiments on rhesus monkeys, in each of which a two-choice simultaneous discrimination procedure was used. In Experiment 1, the choice was between scenes with humans and scenes without humans, with the slide set sizable enough that a large number of trials could be given without repeating any individual […]